The Never-Sit-Still Mushroom

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Never-Sit-Still Mushrooms can be exploited for instantaneous long-distance communication: when picked with the right method, a pair of mushrooms from the same fungus will always look exactly alike. If you dye or dent one, the other will change colour or shape accordingly. Inventive golgnomes have devised a signalling system that allows them to hold a conversation over an unlimited distance. Mushrooms thus picked and used as for transferring messages are known by the name Kolibim Mycoi (“Answer Fungus”). Picture drawn by Seeker.